Sandy has 8 markers. Alex has 6 fewer markers than sandy. Jill has 2 markers. How many markers do they have in all? Show your wo
2 answers:
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Answer:
1.
2. and
Step-by-step explanation:
We have the expression to find the solutions we have to clear
. Then,
Add 64 in both sides of the equation.
Now we have to re-write the equation:
⇒
Then,
Apply square root on both members
Now substitute back
1.
2.
Solving for x:
1.
2.
Then the solutions for are:
To find the x intercepts of the graph we have to replace with y=0.
This means:
We already found the solutions for the expression, but we have to consider only the real solutions.
Because in a graph we can't have imaginary solutions.
Then the x intercepts of the graph are:
and
The graph of the function is:
